glycobiology resources
monosaccharides glycans transferases oligosaccharides protein-carbohydrate interactions
 Monosaccharides
 - Basics
 - Aldoses
 - Ketoses
 - Deoxy Sugars
 - Amino Derivatives
 - Acid/Alchohol Derivatives
 - Uronic Acids
 - Glycosans/Anhydro Sugs
 - Muramic Acids
 - Sialic Acids
 - Higher Monosaccharides


Reference:
Conformation of Carbohydrates
by V.S.R. Rao, P.K. Qasba, P.V. Balaji and R. Chandrasekaran
Conformation of Carbohydrates




  Terminology Search  



Site Search  
 
>> Glycosans and Anhydro Sugars
An anhydro ring is formed if a water molecule is removed from two hydroxyl groups of a monosaccharide. A glycosan is formed if one of those hydroxyls is anomeric, or an anhydro sugar is formed if neither hydroxyl is anomeric. Loss of another water molecule from a further pair opf hydroxyls results in a dianhydro derivative containing three rings. A glycosan is an intramolecular acetal, and an anhydro sugar is an ether; they may be formed from aldoses, ketoses, or alditols in pyran or furan form.
Glycosans of a hexopyranose:
Two anhydro derivatives:  



Site designed and maintained by Aidan Ryan, LECB Structural Glycobiology Section, NCI Frederick, Maryland